Glisan Corporation's relevant range of activity Is 4.020 units to 8,020 units. When it produces and sells 6,020 units, its average costs per unit are as rollows: 8 015728 Direct materials Direct labor Variable manufacturing overhead unaccurina overhead Fixed selling expense Fixed administrative expense Sales commissione Variable administrative expense Average Cost de Unit $ 5.80 3.10 1.70 Required: a. For financial reporting purposes, what is the total amount of product costs incurred to make 6,020 units? b. For financial reporting purposes, what is the total amount of period costs incurred to sell 6.020 units? c. If 5.020 units are sold, what is the total amount of variable costs related to the units sold? d. If the selling price is $19.45 per unit, what is the contribution margin per unit sold! Note: Round "Per unit" answer to 2 decimal places. e. What incremental manufacturing cost will the company incur if it increases production from 6,020 to 6,021 units? Note: Round "Per unit" answer to 2 decimal places a. Total product cost b. Total period cost ~ Totel variable cOsts d. Contribution margin per unit e. Incremental manufacturina cost